Search NASA⌕ Search

DOE OSTI · 1207512

Materials Data on Ba4Bi3F17 by Materials Project

Abstract

Ba4Bi3F17 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of Ba–F bond distances ranging from 2.66–3.32 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of Ba–F bond distances ranging from 2.67–3.04 Å. In the third Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of Ba–F bond distances ranging from 2.67–3.14 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of Ba–F bond distances ranging from 2.66–3.25 Å. In the fifth Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of Ba–F bond distances ranging from 2.68–3.19 Å. In the sixth Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of Ba–F bond distances ranging from 2.68–3.28 Å. In the seventh Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of Ba–F bond distances ranging from 2.68–3.04 Å. In the eighth Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven F1- atoms. There are a spread of Ba–F bond distances ranging from 2.68–3.17 Å. There are six inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Bi–F bond distances ranging from 2.33–2.46 Å. In the second Bi3+ site, Bi3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Bi–F bond distances ranging from 2.33–2.44 Å. In the third Bi3+ site, Bi3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Bi–F bond distances ranging from 2.34–2.45 Å. In the fourth Bi3+ site, Bi3+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of Bi–F bond distances ranging from 2.33–2.64 Å. In the fifth Bi3+ site, Bi3+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of Bi–F bond distances ranging from 2.32–2.68 Å. In the sixth Bi3+ site, Bi3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Bi–F bond distances ranging from 2.31–2.49 Å. There are thirty-four inequivalent F1- sites. In the first F1- site, F1- is bonded to six Ba2+ atoms to form a mixture of distorted face and corner-sharing FBa6 octahedra. In the second F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form FBa3Bi tetrahedra that share corners with two equivalent FBa6 octahedra, corners with eleven FBa3Bi tetrahedra, and edges with five FBa3Bi tetrahedra. The corner-sharing octahedra tilt angles range from 53–64°. In the third F1- site, F1- is bonded to four Ba2+ atoms to form FBa4 tetrahedra that share corners with twelve FBa2Bi2 tetrahedra, edges with six FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the fourth F1- site, F1- is bonded to two Ba2+ and two Bi3+ atoms to form FBa2Bi2 tetrahedra that share a cornercorner with one FBa6 octahedra, corners with ten FBa3Bi tetrahedra, and edges with four FBa2Bi2 tetrahedra. The corner-sharing octahedral tilt angles are 58°. In the fifth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form FBa3Bi tetrahedra that share corners with two equivalent FBa6 octahedra, corners with eleven FBa3Bi tetrahedra, and edges with five FBa3Bi tetrahedra. The corner-sharing octahedra tilt angles range from 51–61°. In the sixth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with eleven FBa3Bi tetrahedra, edges with five FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the seventh F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form FBa3Bi tetrahedra that share corners with two equivalent FBa6 octahedra, corners with eleven FBa3Bi tetrahedra, and edges with five FBa3Bi tetrahedra. The corner-sharing octahedra tilt angles range from 52–60°. In the eighth F1- site, F1- is bonded to two Ba2+ and two Bi3+ atoms to form distorted FBa2Bi2 tetrahedra that share a cornercorner with one FBa6 octahedra, corners with ten FBa3Bi tetrahedra, and edges with four FBa2Bi2 tetrahedra. The corner-sharing octahedral tilt angles are 59°. In the ninth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with eleven FBa3Bi tetrahedra, edges with five FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the tenth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the eleventh F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Ba2+ and two Bi3+ atoms. In the twelfth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the thirteenth F1- site, F1- is bonded to two Ba2+ and two Bi3+ atoms to form distorted FBa2Bi2 tetrahedra that share a cornercorner with one FBa6 octahedra, corners with ten FBa3Bi tetrahedra, and edges with four FBa3Bi tetrahedra. The corner-sharing octahedral tilt angles are 57°. In the fourteenth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the fifteenth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with eleven FBa3Bi tetrahedra, edges with five FBa2Bi2 tetrahedra, and a faceface with one FBa6 octahedra. In the sixteenth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Ba2+ and two Bi3+ atoms. In the seventeenth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the eighteenth F1- site, F1- is bonded in a bent 120 degrees geometry to two Bi3+ atoms. In the nineteenth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the twentieth F1- site, F1- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two Bi3+ atoms. In the twenty-first F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with eleven FBa2Bi2 tetrahedra, edges with five FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the twenty-second F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Ba2+ and two Bi3+ atoms. In the twenty-third F1- site, F1- is bonded to two Ba2+ and two Bi3+ atoms to form FBa2Bi2 tetrahedra that share a cornercorner with one FBa6 octahedra, corners with ten FBa3Bi tetrahedra, and edges with four FBa3Bi tetrahedra. The corner-sharing octahedral tilt angles are 59°. In the twenty-fourth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the twenty-fifth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the twenty-sixth F1- site, F1- is bonded in a 2-coordinate geometry to two Ba2+ and two Bi3+ atoms. In the twenty-seventh F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with eleven FBa3Bi tetrahedra, edges with five FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the twenty-eighth F1- site, F1- is bonded to two Ba2+ and two Bi3+ atoms to form distorted FBa2Bi2 tetrahedra that share a cornercorner with one FBa6 octahedra, corners with ten FBa3Bi tetrahedra, and edges with four FBa3Bi tetrahedra. The corner-sharing octahedral tilt angles are 57°. In the twenty-ninth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form FBa3Bi tetrahedra that share corners with two equivalent FBa6 octahedra, corners with eleven FBa3Bi tetrahedra, and edges with five FBa2Bi2 tetrahedra. The corner-sharing octahedra tilt angles range from 51–63°. In the thirtieth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with eleven FBa3Bi tetrahedra, edges with five FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the thirty-first F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form FBa3Bi tetrahedra that share corners with two equivalent FBa6 octahedra, corners with eleven FBa4 tetrahedra, and edges with five FBa3Bi tetrahedra. The corner-sharing octahedra tilt angles range from 51–61°. In the thirty-second F1- site, F1- is bonded to two Ba2+ and two Bi3+ atoms to form FBa2Bi2 tetrahedra that share a cornercorner with one FBa6 octahedra, corners with ten FBa3Bi tetrahedra, and edges with four FBa3Bi tetrahedra. The corner-sharing octahedral tilt angles are 58°. In the thirty-third F1- site, F1- is bonded to four Ba2+ atoms to form FBa4 tetrahedra that share corners with twelve FBa3Bi tetrahedra, edges with six FBa3Bi tetrahedra, and a faceface with one FBa6 octahedra. In the thirty-fourth F1- site, F1- is bonded to three Ba2+ and one Bi3+ atom to form distorted FBa3Bi tetrahedra that share corners with two equivalent FBa6 octahedra, corners with eleven FBa3Bi tetrahedra, and edges with five FBa2Bi2 tetrahedra. The corner-sharing octahedra tilt angles range from 53–62°.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-30. Materials Data on Ba4Bi3F17 by Materials Project. https://doi.org/10.17188/1207512

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

Cyclic moisture reactivation of calcium sorbents for long duration thermochemical energy storage

The transition to a flexible and reliable energy infrastructure, using electro-thermal energy generation technologies such as geothermal, concentrated solar power, and nuclear, usually demands simultaneous advancement of thermal energy storage (TES) to support on-demand electricity generation and industrial applications while mitigating the inherent intermittency of renewable energy sources and power outages from direct energy generation. Among TES technologies, thermochemical energy storage (TCES) based on calcium looping emerges as a compelling high-power energy storage candidate due to its high reaction enthalpy, compatibility with elevated operating temperatures, and abundance of low-cost materials. However, the long-term durability of calcium-based sorbents for TCES is hindered by surface sintering and particle aggregation, leading to performance degradation over repeated thermal cycles. This study explores a moisture hydration-based strategy to regenerate a degraded calcium sorbent and mitigate performance degradation for long duration TCES. The addition of moisture transforms calcium oxide into calcium hydroxide and produces intercalation water layers, associated with a regenerated surface area and reduced calcium oxide crystallite size. Both these effects are beneficial in restoring the sorbents' reactivity for carbonization. Additionally, an optimized hydration-assisted reactivation protocol balances the recovered energy storage capacity with heating penalty required for moisture removal from hydrated samples, resulting in an enhanced energy storage capacity up to 176% compared to benchmark sorbents that undergo cycling without reactivation after 60 cycles. In conclusion, these results highlight the potential of hydration-assisted reactivation to enhance the long-term performance of TCES, providing an effective pathway to advancing electro-thermal storage technologies.

36 MATERIALS SCIENCE↗